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[09:33:20] JOHN BERMAN, CNN ANCHOR: All right, new concerns this morning that North Korea might be gearing up for another nuclear test. U.S. spy satellites have detected new activity at an underground test facility. This comes as military officials get ready to present the president with potential options in case a nuclear test does occur.

Now, moments ago, the U.S. Secretary of State Rex Tillerson and Defense Secretary James Mattis, they met with Chinese officials. This, of course, follows a very interesting tweet from the president of the United States saying that he honors and respects the fact that China tried to pressure North Korea but failed.

Let's bring in CNN's senior diplomatic correspondent, Michelle Kosinski, at the State Department.

Michelle, what are you learning?

MICHELLE KOSINSKI, CNN SENIOR DIPLOMATIC CORRESPONDENT: I mean look at all of the pressure here. You have the potential, which has been there for a long time, but now looks like it might be ramping up for another nuclear test by North Korea. You have the death of Otto Warmbier, the American citizen who was in jail for more than a year there and died as he came home. And you have this possibility of China putting more pressure on North Korea. The U.S. is trying to make that happen.

You mentioned the tweet from the president. He said, "while I greatly appreciate the efforts of President Xi and China to help with North Korea, it has not worked out. At least I know China tried."

I think this is a good time for this to happen for - for them to try to work together, given that President Trump and President Xi have built this relationship. Not that it's been extremely fruitful at this point. But on the personal side, they've put in some time together to try to establish and expand the cooperation between these two countries. So at least there's been some groundwork laid.

[09:35:05] There is skepticism, though, among analysts that China will do much more and very quickly to turn the screws on North Korea. I mean as its biggest trading partner, really China has that leverage and that's what the U.S. has been trying to emphasize, mostly in the rhetoric, but the U.S. has some leverage there, too. So we'll see how this is worked out. The State Department hasn't wanted to give too many details on how

it's going to try to make this happen in a practical sense, but what they have said is that there has been some progress. We have seen China make certain efforts on trade, as well as trying to better enforce sanctions that already exist. But it's really that next step that's going to come not only from China but from the U.S. and possibly the two jointly together that we'll see if there can be a real impact on North Korea that will ultimately change behavior. And that's really the point here.

BERMAN: Right.

KOSINSKI: I mean there are plenty of sanctions on North Korea as it is, but making it work and making it happen is obviously another story, John.

BERMAN: No, and also unclear exactly if the Chinese tried as hard as the president indicated he thinks they did.

Michelle Kosinski at the State Department, thanks so much.

All right, up on Capitol Hill, we are waiting for what should be a very interesting hearing. The former secretary of homeland security, Jeh Johnson, will testify before the House Intelligence Committee about his view of Russian hacking. He's one of the higher-ranking Obama era officials to testify in public. So it will be fascinated to hear what he has to say, what he saw while he was in office and what he sees now as far as the Trump administration's response.

CNN's Manu Raju is up on Capitol Hill waiting for this hearing.

In the meantime, Manu, there's a lot of other activity going on.

MANU RAJU, CNN SENIOR CONGRESSIONAL REPORTER: Yes, no - no question about it, Jeh Johnson actually in the room right now, John, as this hearing is about to take place. He's actually already met behind closed doors with the Senate and House Intelligence Committees as part of their investigation into the Russia meddling issue, as well as any possible collusion that occurred between Trump associates and Russian officials.

Also right now, the Senate Intelligence Committee having its own hearing. This focusing on the issue of election security. All part of their efforts now to refocus their investigation on the issue of Russia meddling after they had some high-profile hearings with James Comey testifying before them, and as well as other senior intelligence officials as they looked into the possibility that President Trump may have in any way sought to interfere with those investigations that were ongoing into Russia and the Russia campaign.

Now, this comes as the special counsel, Bob Mueller, also making the rounds on Capitol Hill today, planning to meet with the Senate Judiciary Committee leaders. They themselves planning their own investigation. Several - this just shows you, John, several investigations taking shape on Capitol Hill and a lot of very fast- moving developments here. But Jeh Johnson momentarily will testifying about the extent of the Russian attacks in last year's campaign, as well as the effort to try to secure the infrastructure along the state (ph), disagreement (ph) that he had with state officials. But he will say that he did not see any votes that were actually impacted, ballots that were impacted - by the Russia efforts, although he said he did not know whether or not the public in any way was affected by their perception from the Russia meddling effort, John.

BERMAN: All right, Manu Raju for us on Capitol Hill, literally chasing down the key players up there on the Russia investigation. Thanks so much, Manu.

We have a new moment by moment look at the police shooting that killed Philando Castile. This is really disturbing to see, the officer's dashboard camera rolling during the deadly traffic stop.

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[09:42:52] BERMAN: All right, chilling new dash cam footage shows the final moment of the deadly police shooting that ignited nationwide protest. Thirty-two-year-old Philando Castile was shot and killed by a police officer last July during a traffic stop. His girlfriend, who live streamed the aftermath on FaceBook and her four-year-old daughter were passengers in the car at the time of the shooting. The officer who was acquitted last week told jurors he felt threatened. Prosecutors say he was too quick to pull the trigger. And earlier this morning, Judge Glenda Hatchett, who represents the victim's family, said she is still stunned by the verdict.

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JUDGE GLENDA HATCHETT, ATTORNEY FOR PHILANDO CASTILE'S FAMILY: I am still baffled at how 12 people could come to the conclusion to acquit him in this matter because I do think that this is a compelling example of a man who doesn't have - he's not a fleeing felon, he's not combative with the police, he's doing everything that he's been asked to, but yet he still loses his life.

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BERMAN: I want to bring in CNN's Ryan Young in St. Paul, Minnesota, with this new look, this new video that I think everyone who sees it, Ryan, they sit up and are just stunned.

RYAN YOUNG, CNN CORRESPONDENT: Well, it's very tough to watch. We're actually near the place where that shooting occurred. And if you look over my shoulder here, you can see the memorial that's been here since right that shooting happened.

But, look, this happened within about 40 seconds. And everyone who's seen it so far has a sharp reaction that is shocking and disturbing.

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PHILANDO CASTILE: Sir, I have to tell you, I do have a firearm on me.

OFFICER JERONIMO YANEZ, ST. ANTHONY POLICE: OK. OK. YOUNG (voice-over): Newly released dash cam video showing the crucial moments that led up to this deadly encounter last July.

DIAMOND REYNOLDS, PHILANDO CASTILE'S GIRLFRIEND: You shot four bullets into him, sir. He was just getting his license and registration, sir.

YOUNG: The shooting of this man, 32-year-old Philando Castile, by St. Anthony Police Officer Jeronimo Yanes ignited nationwide protest over the use of force by police after Castile's girlfriend, Diamond Reynolds, broadcast the shooting's horrific aftermath on FaceBook last July.

REYNOLDS: Oh, my god, please don't tell me he's dead.

YOUNG: Just after 9:00 July 6th in Falcon Heights, a small predominantly white neighborhood outside of St. Paul, Minnesota, Officer Yanes stops Castile, believing he resembled a suspect in a robbery and had a broken brake light. Diamond Reynolds is seated in the front passenger seat, her four-year-old daughter in the back seat.

[09:45:10] YANES: The reason I pulled you over, you - your brake lights are out. Do you have your license and insurance?

YOUNG: Castile could be seen handing Yanes what prosecutors in the officer's trial say was his insurance card, and telling the officer he also has a gun. The situation turning deadly in just seconds.

CASTILE: Sir, I have to tell you, I do have a -

YANES: OK.

CASTILE: Firearm on me. I don't -

YANES: OK. Don't reach for it then.

CASTILE: I - I was reading for -

YANES: Don't pull it out.

CASTILE: I don't have (ph) -

REYNOLDS: He's not.

YANES: Don't pull it out.

REYNOLDS: Oh!

(INAUDIBLE)

REYNOLDS: Oh, my God, you just killed my boyfriend!

CASTILE: I wasn't reaching -

YANES: Don't pull it out!

REYNOLDS: He wasn't. YOUNG: Yanes fires seven shots, five of them hit Castile, two in the

heart.

YANES: Don't move! (EXPLETIVE DELETED). Don't move! Don't move!

REYNOLDS: Oh, my God!

YANES: Don't move!

REYNOLDS: Don't move, baby.

YANES: Code three. Get the baby girl out of here.

YOUNG: Yenes lets out a tirade of profanity as Reynolds begins her FaceBook broadcast narrating a video that would go on to be seen by millions.

YANES: I told him not to reach for it! I told him to get his hand up!

REYNOLDS: You told him to get his I.D., sir, his driver's license. Oh, my God.

YOUNG: Also seen for the first time, Yanes' back-up, Officer Joseph Kauser, positioned on the passenger side of Castile's car. His casual demeanor up until the moment of the shooting prosecutors say demonstrates he did not feel threatened during the traffic stop. Kauser told a Minnesota jury early this month he was unaware there was a firearm in the car and was surprised when he heard shots ring out because he didn't know Yanes had pulled his weapon, saying he did not hear the majority of Yanes' interaction with Castile and maintained he never saw a gun in the car. Also caught on camera moments after the shooting, the statements Yanes made to fellow officer.

YANES: (EXPLETIVE DELETED) I told him to (EXPLETIVE DELETED) stop, he had his hand on it.

YOUNG: And minutes later, this exchange between Yanes and a supervising female officer.

YANES: I told him to take his hands off of it and then he - he had his grip a lot wider than a wallet.

UNIDENTIFIED FEMALE: OK.

YANES: And I don't know where the gun was. He I didn't tell me where the (EXPLETIVE DELETED) gun was.

YOUNG: Prosecutors say it was roughly 15 minutes after the shooting that Castile's gun was discovered in his right front pocket by an officer assisting with chest compressions on Castile. Yanes was found not guilty of second degree manslaughter Friday and on two counts of dangerous discharge of a firearm for endangering Reynolds and her daughter. Yanes testified last week he feared for his life because Castile put his hand on his firearm, not his wallet or identification, telling the jury, I didn't want to shoot Mr. Castile. That wasn't my intention. I thought I was going to die. (END VIDEOTAPE)

YOUNG: The officer was not wearing a body camera so you don't get his perspective of what he saw inside the car. Diamond Reynolds maintained for quite some time - of course she started shooting that video for FaceBook Live. She says in three interviews with police that she thought that her boyfriend was reaching for his wallet or the seatbelt. And, of course, because of those differing testimonies at some point, the defense attorneys tried to go after that in that court case. A lot of conversation about those seconds right after that shooting. Of course, that's been a big conversation since then.

John.

BERMAN: And the officer acquitted. Ryan Young, thank you so much for that report.

Investors revolt and the Uber CEO resigns amid a swirl of controversy. We have new developments coming up next.

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[09:53:10] BERMAN: All right, a giant tremor in the force in the tech world. The CEO of Uber is out. It was an investor revolt that led Travis Kalanick to resign after months of turmoil. Just a long list of problems plaguing that company.

CHRISTINE ROMANS, CNN CHIEF BUSINESS CORRESPONDENT: Well, look, this is a guy who was known for steamrolling competition, for ignoring regulation, for flouting conventional wisdom, right? But it's that same kind of personality that really created a culture at Uber that he could not survive. The big shareholders could not handle it (ph).

He helped found the company in 2009. And that - Kalanick was a double- edged sword, you know? I mean he's brash. But that brashness in the business world translated into the worst of what's the brogramer (ph) culture. You know, the worst of Silicon Valley. Sexual harassment claims, you know, sexual discrimination, you know, and just - just all around bad behavior here. And many thought that he created the workplace environment that directly resulted in today's crisis.

Here's what he says. He's resigning because the big shareholders want him out. "I love Uber more than anything in the world and at this difficult moment in my personal life, I have accepted the investors' request to step aside so that Uber can go back to building rather than being distracted with another fight." A fight. You might recall the video of him berating an Uber driver. After that went viral, he stepped forward and said, I'm sorry, I need to be a better manager, I need to be a better grown-up. So he acknowledged his own personality traits were creating sort of this environment.

Eric Holder, the former attorney general, led a group of people who investigated the sexual discrimination and sexual harassment claims against the company and had a withering, withering report about the culture that stemmed from Travis Kalanick and his management (ph).

BERMAN: And there were problems. Like a list of problems.

ROMANS: There are a list of problems. So these accusations of sexism, right? They were allegations that they stole technology from Google's - from Google's driverless technology wing. An exodus of executives. And then this New York case where - where money was a mistake, but money - millions of dollars have been withheld from drivers.

[09:55:10] So what happens now? I mean shareholders, you know, investors need to know who's going to run this company. The board's got a lot of work to do. Uber is missing, John, the CEO now, the COO, the CFO, the CMO and the senior vice president of business. Those are all key positions to fill.

BERMAN: I think every consumer in the country wants to know, when I touch my phone later today, will the car show up?

ROMANS: The car will show up. And some day soon, hopefully, the news stories about Uber will be about new technology, about in-app tipping, about, you know, expansion. It won't be about the bad behavior and the bad corporate culture.

BERMAN: Christine Romans, great to see you. Thanks so much.

ROMANS: You too. Bye.

BERMAN: All right, moments from now we are expecting new information in the investigation into the shooting that left Congressman Steve Scalise critically wounded. You're seeing live pictures right now. The FBI preparing to speak. We'll bring it to you live.